Re: Learned from the List
- Hi Roger,
Yes, DevalVR works as you wrote, if the proportion is aproximately 2:1 the projection used is "spherical", if not it uses "cylindrical", this is true in 99% of cases. Maybe the stitching program could add an EXIF code to solve this ambiguity in the JPEG, I don't know.
Anyway, I added the projection options in the context menu of the player since one year ago, so projection can be changed easily.
--- In PanoToolsNG@yahoogroups.com, "Roger D. Williams" <roger@...> wrote:
> On Tue, 03 May 2011 12:36:33 +0900, Ken Warner <kwarner000@...>
> > Roger, you are exactly right. Cylindrical images need a cylindrical
> > projection. Most viewers use a gnomic projection assuming that the
> > image they are projecting is a spherical image. A cylindrical image
> > projected gnomically will have verticals that converge toward the poles.
> > If DevalVR does handle cylindrical projections correctly, that would be a
> > very good thing for architectural scenes.
> Yes, and there's a fairly easy (though not universally applicable) way
> of differentiating between cylindrical and spherical projections. If
> the image has a width that is exactly double the height, then it is
> usually safe to assume "spherical" and if not, well, not.
> Roger W.
> Work: www.adex-japan.com